Answer:
3. Kate has lived here since 2012.
4. It has been raining for a long time.
5.The TV has been on since five o'clock.
6. I have wanted to be a doctor since I was a kid.
7. Sam has studied at this college for only a week.
8. The telephone has been ringing for a few minutes.
9. Maria and Eduardo have been married for three months.
10. My uncle has been in the hospital since last Tuesday.
11. Dinosaurs have been extinct since 65 million years.
12. I've had this since June.
13. I haven't seen my friend since last week.
14. We've been waiting for our flight for an hour.
15. Stewart hasn't eaten any junk food for several months.
